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Sideband · 18th Dec 2016, 7:41 pm

That is NOT a broken filament! The part you are indicating is a spring support for the electrode assembly....there is an identical one on the other side of the valve and these help to keep the assembly central within the envelope . The heater (filament assembly) is not really visible. Please just take my word for it. That EM87 of yours is probably OK. See the attached picture of a brand new Telefunken EM87 from my stock (and I guarantee that mine is OK)!

Actually the two heater (filament) supports/connections are shown from centre left diagonally to top centre.

You have another problem. It's not this valve but perhaps what caused the problem was another component mounted close by that was reflected behind or in the glass.

that looks like a perfectly good valve. The so-called discolouration (on the florescent strip) is caused by normal usage. The rest of the valve looks fine.

18th Dec 2016, 7:41 pm	#12
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,577	Re: Tandberg Huldra 8 valve failure That is NOT a broken filament! The part you are indicating is a spring support for the electrode assembly....there is an identical one on the other side of the valve and these help to keep the assembly central within the envelope . The heater (filament assembly) is not really visible. Please just take my word for it. That EM87 of yours is probably OK. See the attached picture of a brand new Telefunken EM87 from my stock (and I guarantee that mine is OK)! Actually the two heater (filament) supports/connections are shown from centre left diagonally to top centre. You have another problem. It's not this valve but perhaps what caused the problem was another component mounted close by that was reflected behind or in the glass. that looks like a perfectly good valve. The so-called discolouration (on the florescent strip) is caused by normal usage. The rest of the valve looks fine. Attached Thumbnails __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman..... Last edited by Sideband; 18th Dec 2016 at 7:48 pm.